Displaying an image in a QGLWidget

[Jesdisciple]

I have a QGLWidget in a QGridLayout in a QMainWindow. I'm trying to display the contents of an image file over a background. I can get the background onto it until paintEvent runs; then, instead of drawing the image on top of the background, it simply erases the backround. (My other QGLWidget is drawing a triangle just fine.)

(Change .cpp to .h to get header files.)
the QGLWidget: http://bazaar.launchpad.net/~chaos2d-dev/chaos2d/main/view/head:/client/cpp/qt/ui/view.cpp
the QMainWindow: http://bazaar.launchpad.net/~chaos2d-dev/chaos2d/main/view/head:/client/cpp/qt/ui/frontend.cpp
all files: http://bazaar.launchpad.net/~chaos2d-dev/chaos2d/main/files/head:/client/cpp/qt/

The project may be downloaded via Bazaar with:
bzr branch lp:chaos2d/client/cpp/qt

I can't find examples for this anywhere, and as far as I can tell I'm following the documentation perfectly. I've been hung up on this problem for several days now, I believe. Help, please!

[Jesdisciple]

(bump) Still stuck and anxious for a solution.